Patent application number | Description | Published |
20090195448 | Position Computation in a Positioning System Using Synchronization Time Bias - In general, this disclosure is directed to techniques for computing a positioning solution for a mobile unit based on signals received from the satellite navigation system and the wireless communication system. The techniques allow for, and resolve, a synchronization bias that constrains a system time for the satellite navigation system and a system time for the wireless communication system relative to each other. The mobile unit may utilize the defined constraint to compute a position solution in environments where additional independent measurements would otherwise be required. The mobile unit may incorporate Receiver Autonomous Integrity Monitoring (RAIM) functionality to validate the position and time solutions derived from each of received signals. According to the techniques described herein, the mobile unit may be able to utilize the defined synchronization bias to apply RAIM or similar techniques in environments where such techniques would otherwise be indeterminate. | 08-06-2009 |
20090233620 | Methods and Apparatuses Supporting Multiple Positioning Protocol Versions in Wireless Communication Networks - Methods and apparatuses are provided for supporting multiple positioning protocol versions within wireless communication networks. | 09-17-2009 |
20100013701 | Methods And Apparatuses For Requesting /Providing Assistance Data Associated With Various Satellite Positioning Systems In Wireless Communication Networks - Methods and apparatuses are provided for use by devices within in wireless communication network to request and/or provide assistance data and/or other like data associated with various Satellite Positioning Systems (SPSs). | 01-21-2010 |
20100135365 | METHOD AND APPARATUS FOR MULTIPATH MITIGATION - An apparatus and method for short multipath mitigation. In one aspect the method comprises subtracting a first stronger path from a correlation function to obtain a first residual signal, wherein one component of the first residual signal is a weaker path; applying reconstruction on the first residual signal to obtain a first reconstructed weaker path; subtracting the first reconstructed weaker path from the correlation function to obtain a second residual signal; and applying reconstruction on the second residual signal to obtain a second stronger path. In one aspect, the apparatus includes an antenna for receiving a composite receive RF signal, a receiver front-end for converting the composite receive RF signal into a composite receive digital signal; and a processor for performing signal correlation on the composite receive digital signal to obtain a correlation function and for processing the correlation function to obtain a desired signal. In one aspect, the short multipath is identified by computing a Left Edge Height Ratio Indicator (LEHRI). | 06-03-2010 |
20100141470 | SYSTEMS, METHODS, AND COMPUTER PROGRAM PRODUCTS FOR REFRESHING DATA - A method performs an update for a first device that consumes information with a known expiration time. The first device operates within a network that accommodates other devices also consuming the information. The method includes setting a time for the first device to refresh the information, the time to refresh being based on a pseudorandom time offset. The method also includes sending a refresh request to a resource for the data during the set time. | 06-10-2010 |
20110291885 | ALMANAC MAINTENANCE FOR MOBILE STATION POSITIONING - An almanac data management system at a location remote from a cell phone ( | 12-01-2011 |
20130035113 | METHODS AND APPARATUSES SUPPORTING MULTIPLE POSITIONING PROTOCOL VERSIONS IN WIRELESS COMMUNICATION NETWORKS - Methods and apparatuses are provided for supporting multiple positioning protocol versions within wireless communication networks. | 02-07-2013 |
20140135040 | Techniques for generating environment and reference data reports for particular environments on behalf of mobile devices - Various methods, apparatuses and/or articles of manufacture are provided which may be implemented using one or more fixed electronic devices to generate a reference data report corresponding to a particular environment. Various methods, apparatuses and/or articles of manufacture are provided which may be implemented using one or more mobile electronic devices to generate an environment report corresponding to a particular environment. | 05-15-2014 |
20140221005 | TERRESTRIAL POSITIONING SYSTEM CALIBRATION - Embodiments disclosed aggregate a plurality of crowdsourced measurement sets for antennas received from a plurality of Mobile Stations (MS) with a Base Station Almanac (BSA), based on a measurement location estimate and a measurement location uncertainty estimate associated with each measurement set. A map comprising a plurality of map layers may be obtained, where each map layer associates locations in the BSA with spatially variable Forward Link Calibration (FLC) values for the antenna derived from the updated BSA data, wherein each spatially variable FLC value is associated with a corresponding location in the updated BSA data. Map layers, which may also include multipath map and/or received signal strength layers, may be provided to MS′ as location assistance data. | 08-07-2014 |
20140295881 | DETERMINATION OF DIFFERENTIAL FORWARD LINK CALIBRATION IN LTE NETWORKS FOR POSITIONING - Techniques are provided which may be implemented using various methods and/or apparatuses to determine time difference of arrival of signals from two base stations as received at a mobile device, to use the time difference of arrival to determine differential forward link calibration for at least two base stations, and also to determine location using the differential forward link calibration for at least two base stations, determined using the time difference of arrival of signals from at least two base stations as received by a mobile device. | 10-02-2014 |
20140302871 | METHODS AND APPARATUSES FOR REQUESTING/PROVIDING ASSISTANCE DATA ASSOCIATED WITH VARIOUS SATELLITE POSITIONING SYSTEMS IN WIRELESS COMMUNICATION NETWORKS - Systems and methods for requesting and providing assistance data for a satellite positioning system are described herein. A method as described herein includes receiving, at a base station over a wireless communication link, a first message from a mobile station, wherein the first message comprises a first field identifying requested assistance data associated with a first Satellite Positioning System (SPS) and a second field identifying a requested format of the requested assistance data, and wherein the requested assistance data are available in a plurality of formats that includes the requested format; and transmitting a second message from the base station to the mobile station over the wireless communication link, wherein the second message includes the requested assistance data in the requested format. | 10-09-2014 |